Mk1 Wheel Nuts

Can anyone tell me where I can get wheel nuts for R13 Tarantula wheels on an '83 campaign GTi? I've looked at VW Heritage and not sure of correct size. Cheers

3A0601139 - M12x1.5x23.5

same as MK2 Golf, and pretty much every vw or seat ever with 4x100 wheels

earlier VW used shorter bolts for steel wheels, these have since been replaced with the longer bolts above for alloy wheels. and since you have alloy wheels, the above are what you want regardless