Inhouse....no. Never seen one even from the aftermarket sources in 45. Interest just isn't that great to tool up.

Full size 320 - 45 barrels are available. A good gunsmith might be able to thread a FS for use in a compact.

 

Better options would be the 220 or 227. I’m putting a MODX45 on my 227 as soon as it’s out of ATF jail

 

True. Had one of the original cans on a 220. Fun to play with but it took a bit of tuning.