your best bet would be to buy the ashtray rebuild kit from any number of vendors, there are a few that offer it...
On mine I used two small magnets and double sided 3m tape.. it holds it closed, and it slips open easily
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2003 Regal GS - the beater/daily driver - somewhat stock (yeah right). No its not a mustang, at least it's blown.
2001 GT Black on Black 5 speed
MM Strut Tower Brace/Weld-In Subframe Connectors/Koni Springs&Adjustables/Cobra Brakes/Cobra Rack/Tri-Ax/3.73s/SCT Tuner 56k miles