Boatian BT50-QT9 Engine fitting a JMSTAR

[stackat30k]

Hi basically i need a new engine as my previous 1 siezed just after two weeks of owning it due to bad treatment by the previous owner which im very annoyed about as you can imagine.

the bike is a JMSTAR JSD50QT-27 and im having difficulties finding the right engine to fit it ive spoke to 1 guy who has a shop and deals with chinese bikes he sais he has an engine for a Boatian BT50-QT9 which he thinks may fit it but is not 100% sure and its to far to take my bike there to actaully see and even if it wasnt my bike is in a garage in bits

Dont suppose any one can help me im not that good with motorbikes so any advice is great .
i've checked most stores i know about to find the correct engine 'chinese motorcycles' ect but none of them seem to have my particular model, ive even tryed contacting JMSTAR but they say that they cannot ship to me due to them being in china and it would cost a bomb..
im from the uk so if 1 knows of any other stores that they think might have the engine i need pleease let me know

Thanks
Dean