Unfortunately there aren't any more where Justin's came from, I will say though that running it is one of the most exhilarating things I've ever done. One of the neighbors did, in fact, mind though...
It might be worth talking to a company that scraps L1011's:
AGS Co. Ltd
Jeff Zika
27th Floor, Fortune Tower
Ratchadapisek Road, Din Deang
10400 - Bangkok
Thailand
Also, this is only my own view but I would personally not have any dealings with one particular company previously mentioned in this thread. Please PM me if you need more information on that matter.
The best of luck with your search, the RB211 is a stunning engine!