Dear Porter,
The meths burner is still available from PPS steam,if you google it you will find them using the name,the meths burner fits where the standard tray goes,but requires a bit of modification to the firebox hole in the cab and one of the frame spacers needs to be filed or replaced for one with a cutout in it for the burner to fit,a simple job I'm told,all the best,Stew.