Plastic half clips from a MTB should do the trick...
https://www.amazon.com/s?k=bicycle+h...l_4oj5mda5y1_e
Do a quick google search!
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'75 Fuji S-10S bought new, 52k+ miles and still going!
'84 Univega Gran Tourismo
'84 Univega Viva Sport
'86 Miyata 710
'90 Schwinn Woodlands
Unknown brand MTB of questionable lineage aka 'Mutt Trail Bike'
Plus or minus a few others from time-to-time