I'll be honest and say you'll probably have some issues finding Colru parties. I'd suggest trying to get your Shiny Stone via Seals of Bravery instead of farming Colru, as people tend to be more stingy with Colru due to the nature of the battle.

Your only other strong alternative is Chiulin, which is better. But good luck finding Bloody Thorns. Braid Tassel might be cheaper to make, but it's stats aren't as good so you're going to get what you pay for.

You could try blowing up some Taonu Cesti while attempting to +8-10 one, but I doubt it'd be a good investment for now. I think there might be some cheap ones that drop off later bosses now that Ignition added things to loot tables, but I haven't dug around enough to know. If Blood Fist is among the ones that are cheap boss drops, then getting one temporarily could be beneficial.