Update: as suggested by
@laxu , i ended up snatching a cheap, used Marshall Acton III BT speaker (thank you!

)
I haven't plugged it in to a modeller just yet, but it is a 30W + 2 x 15W tiny box which sounds
surprisingly good and balanced with regular audio, so i have no doubts it'll do the trick just fine as a home FRFR. And i dig the looks too
View attachment 52493
Marshall also sells a model with an internal rechargeable battery which, if it had an instrument in, would make it basically the same as Headrush's FRFR-Go. It's kinda odd they don't do 1/4" inputs, given the Marshall name et al.
There's however plenty of space to add one

I'm planning to mod mine and give it a 1/4" input in the back, which should be a relatively simple operation. Expect a writeup once i get to it!