Gave mine an oil change last night, there werent any foamrings in there, but does seem like a gap where they could be put in. Mine are bog standard 302's so I'm guessing no foam to save a bit of cost?

Nope they shouldn't have foam rings. They only have oil seals and dust seals (more like Marzocchi style who AFAIK don't have foam rings in any of their forks).

Domains are the budget big travel single crown fork, yes? Coil spring?

I did service some a while ago, and I don't recall if they had foams or not, but they don't make a whole heap of difference on those chrome stanchions. TFT can supply foams if you want them though.

My Lyrics (same lowers) don't.

Definatly don't have foam rings just Dust wiper seal and oil seal.
Seal kit part no. 11.4015.067.000. As usual I have these in stock 😉

Ok, just wondering. Mine did squeek on first runs before I re-oiled them.

So, if they have same lowers as Lyrics can a Lyric dammper assembly be put it ?

Damper assemblies are housed in the uppers/csu. Damper assemblies are listed as different units on the Rockshox parts fiche, travel varies from model to model, however they may fit.
I don't have sets of forks here to check though

Can you not retro fit the MoCo from a 318? Should be the same for 160 (OEM non U turn) and 180. Have a look in the parts catalogue, or call TF?

To be honest though, it'll probably be far cheaper to sell them and buy some 318s or Lyriks.