I have a TM36-68 that I picked up off of eBay. It's slightly different than a regular TM36-68 but fits and works the same. It's stamped TM36-68 by the factory. You can see photos of it here.
https://sites.google.com/site/myebaystuffsite/tm36-68

When I got it the air mixture screw was stuck and I had it professionally removed and bought a new one. It's a very long story but I wound up with another TM36-68 and now I have this one spare. It has been in my bike and worked about as well as the new TM I have in there now. Which is to say it's excellent and waaay better than the stock carb.

I'll also include the new jets I bought for the carb, which are the ones used in one of the common setups here. All fasteners have been replaced with stainless.

I also have a stock carb that has been rejetted and worked great with my bike for $100. This carb has a 38 pilot and a 132 main on the N1TC needle. 2 clips down with the air screw at 2.5 turns out. With this carb it very easily and runs crisp.


Both carbs are packed and ready to ship and go on eBay if they fail to sell here.

 

Very interested in the TM36.
Gotta check the bike fund piggy bank first.

 

I believe the tm is sold.