Early 70's brake conversion HOSES.

If you've gotta have the "D" shape, use drum hoses from '70 (if they need to be longer, you might have to hunt around) and a set of these to adapt them to your calipers:
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https://www.ebay.com/itm/314662695942?hash=item49435bb406:g:Pv8AAOSw1KRb5ImH&amdata=enc:AQAIAAAA8BVFefiU5tDnFdKP35KB68SviJDGPm/TTSfioTmoLL/vqU8W6UCTchxZ7Sm8WTXAezanbzeVzRABNS/4rzu+X7sQvQ0zswtadVDW/bRb8Kx2uSJSrH/udFtdplNpTLKDPoU4lisII5S1P2R37zDesfLosekmR+bcPH7DLN1rrtfTE4iJDqF88cpOPaiX2GskWXqjJjElAEwGKmjor5bcny8YdslCp7SgE/hnOlvm4Po1L+wvIeDLCvY0YoHyAa8V+W0ucF6Dq2w1CrscbdIaGqarWbOhvGv5kL3YMXIbWFOD3Dg9z0JBSQEzaUL+KDTpMg==|tkp:Bk9SR6rghOH9Yg