Want single chainwheel crankset with 34 tooth chainring

I lately constructed up a brand new highway bike with a Specialised carbon body, and might’t set up my regular 38/26 crankset due to issues attributable to the entrance derailleur mounting. So, wish to use a 1×11 association with a 34 tooth chainring and a 11/42 cassette. A lot of 30 and 32 tooth single cranks out there, however have been unable to find a 34 tooth. It seems that most if not the entire present 1×11 cranks use “direct mount” chainrings that I’ve no expertise with. Is that mounting approach standardized throughout crank manufacturers? So, I’d use a SRAM crankset and substitute a 34 tooth chainring from one other producer?

Misc. information: body is BB30. The very low gearing is required as a result of I dwell in a really mountainous space, and I am older than filth.