The 'mini' Twin you are looking for is a Vibrolux Reverb. Not a HRD, CVR or anything modern from Fender which have not enough tubes and too many changes to circuit, cabinet and speakers. My bandmate has a HRDlx with 2 x 12s and it sounds not much like my VR or a TR. The VR does sound like a little Twin until it breaks up, then it has delightful tube rectifier sag. 35-40 watts from 2 6L6s.
A VR is 2 x 10, almost as small and about 10-15lbs heavier than a Deluxe Reverb. DRs sound good but break up much earlier and 6V6s are a little different tonewise than a Twin - so is the sound from 1 x 12" speaker. Pro Revs are great amps but use the same 2 x 12 cabinet and are more like 70 or 80% of a Twin. They and weigh not much less and are still loud, which makes them too much amp a lot of the time.
A Vibey is clean/loud enough up to 5 or 6 to live with a loud drummer. Reverb and tremolo is classic Fender. Weighs 50lbs instead of 90-100 like a Twin. Apart from a stupid pull boost that arrived in the late 70's that you can leave unpulled, up until they stopped making them in 1982 they are close to identical to a Blackface. They are one of the easiest to mod back to that level if you desire They never got the mid control on the channels, like most BF amps don't but you don't miss it. They sound great as is. Pine or ply cabinet, CTS speakers (alnicos are great).
Unfortunately the secret's out on them - the price horse has bolted. Note that the modern Custom Vibrolux Reverb has almost nothing in common with them other than 2 x 10 speakers.
Info on Vibrolux Reverb