http://www.oringswest.com/A 129 may fit in a pinch..........
35.4 MM is ID of o'ring.... 25.4 MM = 1 inch
35.4MM = 1.555"
1 MM = .040" rough and dirty
2.4mm = .096"
100 series is close.......
129 spec. is on chart in link.....
there......... Canada switching to metric 30 years ago finally paid off......... if I did the math correctly in my head.......