Well, you haven't said what kind of skillet it it, but I would think that in most cases you should be able to get spare parts for it.
This is quite a comprehensive list of small appliance part suppliers. I recommend you go to this site, once it opens in your web browser, press "Ctrl f" which will open a little word search window. Type in "name of company" in the space and click "next". Each time you press next "name of company" will be highlighted in the next parts company that sells that companies parts. You should then be able to find the web-site for that parts company by scrolling down a bit further.
http://www.jneuhaus.com/appliance/index.htmOr you could do what I would do. Find a way to either score the lines into the plastic of the old controller or design and print a replacement paper on the computor. And of course there is always glue!
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