Ran across these, for combustions.

[willarddaniels]

You can get them at Lowe's for under $10.00. It comes with the "button, hammer and crystal", wiring and replacement grill adapter/spark housing. Remember that buying things on eBay can get spendy. This item is not $3, it is $5. You need to calculate the shipping cost into whatever you buy on eBay, unless it is being sold with free shipping. This is why so many sellers demand outrageous shipping fees- they can dope many novices.