From NAPA

Quantity,Item, part#, cost

1 each, Signal-Stat 900 signal switch,  #LIT 900, $53.53
1 each, 6volt -3 pin flasher, #NFL 535,  $4.49
1 each, flasher socket, #ECH LS6246, $4.00
2 each, 6 volt lamps, #LMP 1154, $2.54
1 each, 6 volt miniature lamp, #LMP 51, $0.96
1 each, Murray Type F No.20 hose clamp (44-21 mm), $1.29

From U-Haul
1 each, Magnetic Tow-A-Lites, #MTOW, $29.95

From Rod Shaver's MV Parts (480) 893-2201
1 each, intervehicular cable (for plug only), , $20.00

Total cost of listed parts = $116.76

Misc shop supplies:
electrical tape, solder