Sapper, it would certainly be interesting to see what you can pull off ..,erm put on, since you have the plastic piece.
I would carefully clean the contact areas with a wipe of acetone, as it will slightly melt the plastic and remove oil and grease residue thoroughly I have heard.
I would use a new pliable piece of vacuum hose so you don't have to use as much force to get it on and a film of oil to assist further in getting it on without breaking it would be a good idea after the cement has had a good amount of hours to set.
It should work as there is no real load on it once set up.
Best of luck.
