90 bush button lock barrel problem can't find part number

Hi hope you are all well

I have fitted new push button handles to my 90 and have also brought new barrels the orange sleeve that goes on the barrel has broken and I can't find a part No. to order a new on

I have looked and other people have had the same problem but there is never an answer so if you could help that would be great thanks for taking the time to read this Simon

Its ok I have found that you have to get a new handle that cost about £14