Custodial Platinum & Palladium

I see that Goldmoney and CMI Group have a custodial palladium and platinum service, but while PL seems reasonable, the PA spreads look very wide to a newcomer from other metals.

Is anyone using Goldmoney for Platinum Group Metals, or maybe can recommend these or another vaulting service, possibly in the far east. Bullion Vault only do gold and silver unfortunately.

I know there are the various ETFS available, but right now I'm looking at vaulting. Or to put it another way, I can't put the possible Street Name and eminent domain complications completely out of my mind. But I'm ready to take suggestions from anyone with familiarity in the matter.