I have tested the TDA1541A direct replacement with 8xTDA1387. Can be found very cheap on ebay or AliExpress.
I want to say that is very close to TDA1541A and is excellent for 10 euro.
I've build a second version of tube output. This new version is having soft start, DC supply for tube heaters and bigger output capacitors.

Have a nice weekend.
Regards,
Vlad