After countless hours of research I found the dream bike I built in my head.. Redline's Monocog 29er single-speed mountain bike! (6'0 tall so I believe a Large)

of course, they're impossible to find new or (even harder to find) used.

I'd greatly appreciate ANY advise or ideas you may have for me. If there are any similar bikes, Single Speeds with MTB tires... please drop some knowledge on me!

..ive scoured every bike listing online with no luck. If there are any particular sites you could recommend i be searching, that'd be helpful as well.

Appreciate any help. Thanks!!