On Jamil Z's recommendation on the BN I bought some post and lid o-rings in silicone and dip tube o-rings in buna-n but the quad seal profile. Same sizes as above. In all cases they are markedly superior to round profile buna-n o-rings and well worth the very small increased cost. Silicone is less durable than buna-n but I have seen no wear in over a year. If I have to replace these every 3 years instead of every 5 or something, I still think it is a no-brainer. do you have those part numbers?
They are easy to find using the dash numbers above but with the varying materials and cross section type. Here are the McMaster-Carr part numbers:
Buna-N Quad Seal for diptube: 90025K368
Silicone round for post: 9396K24
Silicone round for lid: 9396K926
The quad seal ones for the diptube are amazing in terms of how it feels as you screw the post down into them and how well they seal with very little torque applied to the wrench.
With the silicone lid o-rings, I have noticed fewer problems with leaks.