I work for a pool company in Mississippi, and with the current supply chain issues, i cant get the parts i need from our regular commercial supplier.  This is what ive got, its a round about 20yr old vogue impact 52"x15'x30' oval with resin top rails.  According to every bit of info i can find out about this pool, it did not come with or require (when new) channel stabilizer rails to go under the top rails to hold the liner to the top of the wall.  The customer said when he tried to put a liner in the pool about a year ago using another company, they had the same problem we are having now, its a j-bead liner that keeps falling of the wall as soon as it gets pressure on it.  Im trying to find a top channel stabilizer kit for this size pool, with all the curved and strait sections to cover the complete pool.  If anyone knows what i might need, please let me know.  Ive been a pool and spa tech for about 10 years and but i havent had much experience with ovals.  Any help with this would be appreciated.