Any good ideas on how to repair this? Would liquid silicon work good on the inside of the bumper? What would you recommend?

DUCT TAPE

ok maybe not

you could get it plastic welded/stitched. or just get a new bumper

take off the bumper and use some plastic stitch/glue and go to town on it and it will hold we used 2 do it in autobody all the time, and then repair and paint the outside of course

good luck

New bumper = too expensive

Where would I get this plastic stitch/weld?

we had it it was like a 2 part epoxy but meant for plastic, go to your nearewst auotobody place and ask or evento an automotive store

this is an option....If you could find a bumper in that color you'd be golden...to pain a non-right color one will be very pricey......We need to find a blue parts car for ya and get the fender and bumper. I've been shopping around for bumpers lately and they are usually around $150 or $100....fenders are about the same, the trick is finding one that matches your car paintwise. I'd epoxy it though then find some touchup paint and do that for the time beign.