RL7 valves ?! non standard

[Warwick67]

Anyone know what type / where to get a set of valves for my RL7s? They have a 13mm hole vs the standard11.5mm..... got a nice set of 888 on my newly returned wheels ( bought without valves & tyres ) 1st event is next WE and I can't get any friggin valves! Help!!!

[Gazzab]

I've searched the web and can't find anywhere that has any info on such a size. Strange one.