I got an Omega c760 XL without baseboard in very good condition. It has a 35mm carrier and lens board for 39mm lenses. This is the extra long version with angled column for big enlargements. I have the mounting bolts and nuts for the attachment to the baseboard but no base. You can get a piece of mdf from home depot or lowes and make one by drilling 4 holes. You can get rubber feet or if your building a table around it, you can get self leveling feet (it requires you to pre-drill some holes to insert feet that you can adjust by turning a wrench).
How about $50? Located in Brooklyn as well. PM for more details.
Thanks, but I think I'm set now. I got a super-cheap Focomat 1B off ebay with no expectations that it would actually work out, and it did! I have to check the alignment (not that it is adjustable, but things could be slightly out of shape) more accurately later this weekend, but so far it looks good.