If nothing else, you can sell items in the Bazaar to buy souls. They go for 4 pence a pop, I think.
You wanna know something that's massively crazy? I'm saving up for a storylet that requires 40,000 Prisoner's Honey (4 pence apiece). And I'm well over halfway there.
Eurus: Very nice! I'm not sure where to find all the gems for the walking-stick...