Hey,
its really not that difficult to do it yourself.
Take off the old one, and use it as a template on paper. Test on the camera, make sure that it all seems to fit right before cutting up the bag.
Use alcohol cleaner to get rid of the old glue gunk on the camera.
Several pointers, the thickness of the bag leather versus the original may not be exactly the same, which means that there may need to be some minor adjustments to the template to make it all fit nicely.
Also, how easy the process is also depends on the structure of the camera you are trying to re-furb. Cameras with mainly flat panels (SX70 roid), or even curves (russian FEDs etc) are naturally easier.
But, if I had to re-furb the camera, I'd try to do it myself first.
Which camera is this?
cheers
rf