I recently bought 10 plastic Silva punches for our group for £40.64 including VAT & postage. The website I used was ukge.co.uk

Do they have to be metal?
You can get the plastic punches with metal spike patterns from orienteering suppliers, eg ultrasport, and they are much cheaper!

I recently contacted Maun Industries regarding these only to be told that they have stopped making them, although they have a small stock

Groups should perhaps consider putting in an order now before they all go. They have hearts, clubs, diamonds, spades, triangles, circles and rectangles in their catalogue and definitely hearts still in stock. Price is £3.91 each, plus £10 p&p plus VAT

Website is www.maun-industries.co.uk

All the on-line stationers I looked at were selling Maun punches. Are there any other manufacturers?