Take some pics to show us?
you might be able to cut them, then hide the repair with your coverstrip? (depends how bad the mess you are left with after cutting)
also - LAST RESORT... assuming the pieces are going to be trash if it doesn't work or ruins your plastic -
Try
http://www.amazon.com/Satellite-City-US-1-Super-Solvent-Ounces/dp/B003L0XBCK/ref=sr_1_2?ie=UTF8&qid=1380731174&sr=8-2&keywords=ca+glue+debonder
or
http://www.amazon.com/Un-cure-debonder-1oz-Smith-Ind/dp/B0000DD1QS/ref=sr_1_1?ie=UTF8&qid=1380731287&sr=8-1&keywords=ca+glue+debonder
I tested the second one on some ABS - when left overnight it started to soften the ABS itself. Have never used the top one, but might try it.