Article by IronMick of the XLFORUM® ¹⁾
In the event that you cannot find forward controls specifically for your year model, you can find something that you can modify to work.
However, working well can be a challenge.
Below are some mods made to a 1980 XLH.

Shift side should be no problem. Brake side would require some work.

When I looked at an 86 to 03 custom Sportster it occurred to me that I could make the forwards work on my 1980. ²⁾
It was looking at the brake side that convinced me - the way they fit between the case and the exhaust.
(and the similar rear brake master cylinder)
I found a new set of after market 86 -03 HD style forwards on eBay for about $220.
Examining the parts I saw that I needed to drill 1“ diameter holes in the lower front engine mounts.
After much discussion on XLForum and consulting with my indie mechanic, I decided to do it.
I let the indie drill the holes as my small drill press would not handle a 1” bit.

Re-locating the left peg position, see red circle 3)	Right side Assembly 4)

• Right Side Parts: (note spacer between large washer and mount)
  • Threads on Part = 1.08“
  • Spacer = 0.32”
  • Flat washer = 0.17“
  • Engine mounting plate = 0.17”
  • Nut = 0.42“
  • E-clip
• Left Side Parts: (no spacer needed)
  • Thread Length on part = 0.69”
  • Flat washer 0.17“
  • Engine Mounting plate 0.17”
  • Nut 0.35“
  • E-clip

Left shift lever 5)	Shift lever 6)

Left side shift pedal. 7)

Shift Pedal 8)	Brake pedal. 9)

Pedal 10)

Brake lever mods 11)