Road fixed / fixed road

After a LOT of looking, i've not been able to find anything OTP like this

I’m on this wavelength.

But I’m happy with 4130 as cheap....

This gets you close. No horizontal top tube and unknown steel.

https://www.condorcycles.com/collections/single-speed-track-bikes/products/condor-tempo-frameset

Flyer with 853 sticker

How about https://www.spacycles.co.uk/m1b0s193p4421/SPA-CYCLES-Audax-Mono

Reynolds 725. Steel or carbon fork.
Nearly horizontal?
Yes
28c max.
Yes.

Most the bikes that match that criteria seem to have a reputation of being a bit heavy/dull to to ride. How about a used Cinelli Vigo steel? Doesn't have a horizontal TT but word is they're very nice to ride and will clear 30/32 front and back. Send it to Winston for some rear eyelets and use p-clips on the front. @yetidamo will tell you how nice they are for a RF base.

When my Dart dies/get nicked i'll be getting one.