With a bit of ingenuity, you might be able to take it apart and re-arrange the internal leafs to suit your current key.
I've done it several times on Japanese bikes which have multiple locks so I only had to replace the broken one. I also did it on the fuel cap lock on my bullet. Some of them are held together with screws or a circlip which is easy. Others are pressed together and you need to bend back the curved over steel edge round the cylinder to get the core out.
You could practice on your old one.
Here's a decent video showing the principle, once you get the core out, they are all much of a muchness. Worth noting that some cores have a large leaf right at the end (furthest from the keyhole)thyat acts as a latch to stop you pulling the core out. It's not an actual locking leaf, the key doesn't act on it. This needs to be pressed down with a fine screwdriver or pick tool to let you pull the core out.
https://youtu.be/FX2AH9-isPA
If you want the really lazy way, once you have the core out, you could just remove all the leafs and then any key will work. Or you could put the key in and file down the leaf protrusions level with the barrel which would still give you a working lock but if there was a particularly high/low cut on the key, you could land up without much meat left on one of the leafs which could bend/break.
Also, any halfway competant locksmith would be able to do this for you, or even impression the lock and make a key for it. I'm not a locksmith and I've done it several times.
