With careful measuring and a good straightedge, you can cut down 120 paper to the correct width and length for 127 in just a few minutes. For many (most?) 127 cameras, you'll also have to mark the paper with frame numbers in the correct locations. Or you could just get an old roll of expired 127 film and re-use its paper over and over... With a little care, it might last a long time.
Nikon S2, S3, F, F2, F3, FM2, FA, N90S, D80, D7000, D750, Sony a6000, Canon IIf, Leica CL, Tower type 3, Zorki 4, Vito B, Perkeo II, Rollei 35....