'98 dipstick tube o-ring size

[newsgit]

Hey ya'll, I have a leak from where the dipstick tube meets the transmission on my '98 gt (automatic) (possibly; it's a slow leak and I think that's the most likely culprit). I'm having a tough time nailing down the correct o-ring size for that connection; does anyone here know it?

 

[96blak54]

Surely someone here would know this or have parts laying around to check.

 

[RAU03MACH]

I have lokar dip stick on mine
There was no o ring just a rubber boot that slides in the hole