When I had to ship some Volk TE's I was able to put heavy cardboard on the front and rear of the wheels, then wrap them with packing tape. Basically the tires themselves were open and exposed but the rim was protected.

It was $150 to ship all 4. They were 19's also so the weight should be very similar. Just use their most bobo shipping method and pack them this way- should be much less expensive and if you do it correctly the rims will not get damaged.

Best of luck- I would snatch these wheels from you if I had the spare cash.

yeah I've shipped wheels and tires before....shouldnt be more than $150.