FWIW, Rose City Textiles has 3-M scotchlite piping and tapes... I think the
tapes are half inch and one inch, but may be wrong. Also has wide
black grosgrain with about an inch wide strip of Scotchlite down the
middle that makes it very easy to sew.

The piping is made of approximately heavy butcher string cord with
scotchlite applied to what appears to be a lightweight tricot. Inserts
very nicely into seams.

Kay