do you still have the other piece or it shattered?
you would probably be best trying to source out a replacement bumper, would be cheaper
^^^ effort......
Get a 2nd hand bumper. JOb done
From an EP82 perspective, it cost about £30 for a 2nd hand bumper. Not sure what costs are for EP91, but there’s no way I could be bothered to start fucking around with fibreglass and jelly filler shit and then getting it painted.... from an inexperienced person dealing with fibreglass (not saying this guy is) but it could turn out proper shit
20 euro are different from buying a 250 euro bumber for 50- 70euro will be worth geting a new bumber but not more i say its only matter of opinion , its the cheif that need to decide