Technically, no RCA connector is 75 ohms, regardless of the marketing BS. Some commercial RCA cables might use 75 ohm coax as the cable (Belden 1505, etc.). You could do some of these:
Enjoy The Music's Max Rochlin Memorial Digital & Video Cable.
(6) Redco Audio - Canare RCAP-C4F Male RCA Crimp Style @ $3.50ea = $21 (or available at markertek as well for $4.09 ea)
(6) Canare Corporation Of America Canare CB25 Colored Cable Boots for LV-61S / L-4CFB / V-4CFB Cable Connector Boots at Markertek.com @ $0.25 = $1.50
(2 each in red, green and blue)
(60') Belden CDT Inc Belden 1505A RG59/20 HD and SDI Digital Coaxial Cable Bulk Digital Video Cable at Markertek.com @ $0.49 = $29.40
some heatshrink, techflex and maybe a bit of Caig ProGold. Don't need the Canare crimper really, just a soldering iron for the pins and some pliers. So $50+ in parts, versus the $112 that BJC charges for their 1505F cable or $85 for their 1694a cable.