Blimey - it is identical to my fujin sl - exactly the same bike conversion! I can't imagine what a bike thief is going to do with it - it's not easy to ride at all and I can't imagine the bits are worth that much.
Anyway - to the OP if you need a replacement I will do you a great deal - I fear I am never going to regain the form that makes such a machine really fly. I had a fantastic time when I could though, and many happy memories.
Never thought of hitching a trailer to it though.