This would work very well. Most butchers will have packs of 1 or 2 pigs trotters - scrub well, heave ONE into the pot with the pease and when cooked you’ll have a lovely gelatinous stock.
They don’t have much taste - you can make sweet fruit jellies with pigs trotters and very nice they are too - but the collagen/gelatine they release is incredible. Freeze the other trotter for the next time.