Having the dial markings disappear from cooktops is very common and often caused from regular cleaning. For tenants moving into a new property it can be tough for them to work out how to correctly use the appliance.
Here are some sites and ideas, which may make your search a little easier.
http://www.ovenlettering.co.uk/
This company have devised a way to put lettering directly on the appliance. They supply two sets per order – so you have a spare or in case you make a mistake. The testimonials looks great!
The brands include: Westinghouse, AEG, Miele, Blanco.
Selling via their eBay store they have replacement decals, markings and stickers for gas ring and electric cooker hot plate position indicators. Plus replacement gas oven numbers & replacement oven temperature markings and numbers.
http://www.stoveconnection.com.au/shop/index.php/cooking-parts/control-panels.html
For SMEG appliances
https://shop.onlineappliancespares.com.au/
This site also has universal cooker knobs and they cover a range of brands for spare parts too.
Two other ways are:
- Google using a good mash-up of words like ‘Stove Cooker Oven Hob Symbols Labels Stickers’.
- Contact the manufacturers directly. This can be tricky as they will all ask for a model number.