I owned the FORESTS and ARROS simultaneously in a prior system. Because the ARROS are distinctly unique and very different from the FORESTS sonically in almost every manner, I suggest you first decide which model sonic signature you prefer, especially with a tube amp.
Without prejuduce to the former, I do not believe there exists another speaker brand that mimics --much less clones -- any of the TOTEM speaker models starting from the ARROS on up.
You asked for alternate brand suggestions to mimic the FORESTS, but not asking for opinions to actually pairing up bona fide FORESTS to your tube amp.
FWIW, I've test driven the FORESTS with the top of the line CARY tube amp and it was a very very poor match..... Bad, actually in a swap-in / swap-out shoot-out audition with my amigos. FORESTS are well known as "grunt" hogs that favour high current and high watts usually found in solid state amps.