I have done a similar dash hack to a previous car. The trick is figureing out how you are going to reattach the surround so it doesn't look like a jagged mess. When I did it, I was able to use small nuts with bolts to reattach everything together, on the underside.
Also if you really want to get creative you can buy some spare pieces of ABS off ebay, then get a tube of fusor to bond everything together how you want, body fill, sand and paint, or cover with fabric.
Also if you really want to get creative you can buy some spare pieces of ABS off ebay, then get a tube of fusor to bond everything together how you want, body fill, sand and paint, or cover with fabric.