Hi Rosie! Welcome!
I'm also a windowsill-phal-grower, so I'm excited to have someone else along on this compact-phal adventure!
You've got an impressive grocery store that stocks fancy hybrids! Yay! If you're looking for more similar ones (compact size, multiple spikes, blooms more than once a year), I've found that the specialist
OrchidPhile has a lot of these. They do mail-order from their CT greenhouse. I just picked up some lovely varieties including a Chia E. Yenlin. Also, I've got my eyes open for a Phal. Jiaho's Pink Girl which
Hausermann's has in stock right now. Good luck in your search!