There's one available in the UK for rent through eBay
BMW x5 E53 Rear Subframe Bush Tool Rent 7 Days | eBay
The shipping cost listed on the auction is pretty high, but if you read the INTERNATIONAL SHIPPING NOTE the guy explains his situation with PayPal;
"If you pay by any other method, I will reduce the shipping cost to a sensible level." I'd be happy to rent you mine, but shipping from here would be, um, really expensive.