Need recommendations for an alternative to Ayon Crossfire integrated

Line Magnetic maybe your best bet.
The LM-212PA monoblocks are 32wpc. It uses a 300b as a driver for a 212 tube.
They also make the LM-805IA integrated which is 48wpc and uses the 805 tube.

mastersound compact 845 or evo 300b
https://www.audiothesis.com/mastersound

heh Bob, any dealers within driving distance that you can visit?

No, I wish. 

Regarding the Line Magnetic LM-805ia that was mentioned above, as a point of information I believe it is the same amp that is known as the LM-508ia. Perhaps the model designation that is used depends on the country the amp is supplied to, or the AC voltage it is set up to operate with.

I have no experience with Line Magnetic products, but as a search of past threads here will show that amp is owned and/or has been favorably commented on by some members here who are particularly well respected.  Some of whom also use Tekton speakers.

Good luck. Regards,
-- Al