Some perusing around found me some doors. A fair amount of pictures in this one, so it's all behind the More tab.
First, it turns out Mantic has some plastic doors:
I don't really feel like ordering from Mantic in the UK, but here they are on Amazon.com:
That's a start for double doors, at least.
I found them thanks to this review.
Dwarven Forge naturally has more doors. Still no double doors, but they have a painted set:
And a nice painted set that has less doors but has some nice accessories. They also have a city door set I'd find largely useless, except it has double doors! There doesn't seem to be a way to get them piecemeal, though, which means digging on eBay. I might just email Dwarven Forge and ask - a door set plus a couple of pieces, or just a few double doors and variant doors, or something like that, would be nice.
I also looked into paper, and I thought, maybe I have some. A while back I got a pretty good deal on Steve Jackson Games's Cardboard Heroes Dungeon Floors. There are 1-yard doors, but they're just counters, and there are no double doors or ones suitable for conversion.
In any case, instead of cutting it up like I did my Cardboard Heroes set, I simply color-copied the pages I needed a couple times. Recently I had a little time to work and busted out the copies and some cardboard, and made these:
- two staircase corners (or maybe spiral stairs?)
- three 6.5 yard long x 1 yard wide stairs.
- one 6.5 yard long x 2 yard wide stairs.
They're all double-sided, and reversible (so the dark-striped "down" and light-striped "up" back one another.) I really need to make another 2 yard wide staircase so I can do a very long staircase, and make a 3 yard wide staircase, too. They're made precisely enough that you can cut the edge off a stair and reverse it and it'll mesh with the others. Seems like I could probably do 3+ that way, too.
Those corners are kind of odd - they've got a weird squished hex in the middle, and I'm not sure if I should cut them in half or leave them as-is and just figure out how to adjudicate those hexes. I tried a cut-in-half version and it works okay for stairs that turn suddenly, but that's about it. Not great for L-shaped stairs as the hex facings change. Annoying.
I also need to make a landing, for those C-shaped staircases I'm fond of drawing on maps (down-landing-down-landing-down.)
For reasons I can't recall now, I have one page of dungeon floors extra that's not from that spiral set. Maybe it came with something else, or maybe it was a one-sheet sale and I needed to fill out an order for some reason. That'll go on the auction block.
I actually ordered from Dwarven Forge circular stairs and staircase bottoms from eBay years ago, from the same guy I got the doors from. He went out of business after cashing my check, though, and I never got them. I think I paid $18 for the pair, which still hurts. But I'd buy again, if I had to.