I have for sale an FP-415 Mountain High Full-Pack Padded Carry Case, Catalog Number FAB0010, that will fit a 21" high by 4.375" diameter Oxygen bottle.   It has all the original black straps and snaps for securing to your aircraft seat.   The fabric is grey.   There are two zippered accessory pockets sewn on and it has a carrying handle.   It has been used five times and is in excellent condition.   You can view the product info at

http://www.mhoxygen.com/index.phtml?nav_id=28&product_id=122

It cost $75.00 plus tax and shipping when new.

It is for sale for $48.00 plus cost of your choice of shipping.

There are three photos of the case attached to this email.

Thanks for your interest.
Harry League