Thanks for the tip. I would recommend purchasing these copper washers with new SS lines.
The prices seem to vary a lot on amazon. Below is an example.
Parker 1/4" Copper Flare Gasket PK 10 (Pack of 5)
Brand: Artist Unknown $137.54. Only $13 each!
I did find 3/8" 10each for $7.60. The 3/16 and 1/4" were not readily available at Amazon. Maybe others will have better luck searching than I?
After some more searching I did find these on Ebay. Closer to what I feel is a fair price.
https://www.ebay.com/itm/22498158966...Bk9SR8js7LKTYQ
10 for $2.87 and $15 dollars shipping. LOL. Still only $1.80 each.
Cheers