I found the main dash ones from India of all places!! eBay item number 171252378433
Are the gauge ones different? I need to do mine at some point - I had assumed they were the same! :s
I still have some stock! Not sure if they will be replaceable when gone...
Currently £1.40 + VAT each for the short round head version.
The longer head version in good supply at 0.50 + VAT each.