Ithaca BSA Meteor .177

[43islander]

Many years ago I purchased an Ithaca BSA Meteor rifle which I still have and shoot. I am in need of a rear sight. The original which was plastic fell apart! The sight needed will have a base with a small pin first followed by a screw for attachment then a large pin. These match their respective holes in the breech. Air Rifle Spares in the UK has them but with shipping charges they are terribly expensive!
Any suggestions? Regretfully the people at BSA USA are really not helpfull since they were acquired by Gamo.
Thanks

[RedFeather]

I would suggest a Williams FP peep sight (same as the old Beeman sport aperture).  You gain substantially in accuracy and will appreciate it if, like myself, you can't see your factory sights due to age.