Tube type question, 12JGT, 12JGT, PC86, for Thoress FF preamp.

I’m having a hard time finding a specific tube type listed in the manual for my preamp, Thoress FF (Full Function) Preamp. I’m wanting to retube and tube roll.

It lists:

 2x 12J5GT   found many on eBay etc. no issue. Other then maybe a recommendation of which brand / sound signature.

2x 12JGT     I can’t find anything online about this one. I’m wondering if the manual has a typo. I’ve reached out to Thoress. I’ve only found 12J5 and 12J7 types

2x PC86       Also found many on eBay. Never encountered this tube type so not sure which brands are the best. From my reading this was an oscillator tube originally.

Any assistance in tube recommendation and if you know what that 12J tube is, I’m aware that the GT only means glass tube.

Cheers.