High output MC cartridges

Please do.
I know Chak will regale with you lists of vintage mm carts although some will be near unobtanium and as for spare NOS styli...... 

Although sometimes you just have to be in the right place at the right time.

Yw.
Btw I have no affiliation to Hifi Heaven but I have bought quite a number of items from them over the years and Jim is nearly always willing to strike a deal.

Good luck!

The horn
Did you see my post on the demo Aida for sale at 1099 USA dollars on eBay?

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F123800444511

A cheap SUT opens up a whole new world of options ( and possible confusion granted) but should not be ignored.
Then there are no gain worries at all.
There are some good deals on the Bay right now on Soundsmith Aida if you want to try a good MI cart out.