Mk... just had a look at my Trini Schematics and those part numbers you list are not on there...?! Maybe I have an older model? You sure this is a Trini 30 and not a Trini 30A?
Anyhow, difficult to say without seeing pics of your reel... but on the Trini 30 Gold, the Anti-reverse clutch looks like this...
If those 2 pressed steel pins have come loose and the plate holding the housing is loose, you have 2 options - fish with it until it comes apart, bearing in mind that the Drive Shaft would keep the bearing reasonably well on place along with the Roller clutch sleeve.
Or replace the side plate.

Below pic shows the removal of the bearing...
Now, is the metal housing that's left behind after removing the bearing (LHS of the pic) loose? If that's the case, then you will probably need a new Side plate, because the only way that housing can come loose is if it has worn the frame of the side plate.
But if that metal housing is still fixed, and it's only the plastic bearing casing that is loose, then simple replacement of the casing should do the trick?
