Hi NewMex999,

From SuperBright LEDs, a company in the St. Louis, MO area:

https://www.superbrightleds.com/moreinfo/high-beam-and-low-beam-headlight-bulb/led-headlight-kit-9004-led-headlight-bulbs-conversion-kit-with-built-in-fan/2116/4805/

Shows a 9007 bulb set. Not 9004. Comes with a ballast and a heat sink at the rear of the assembly. I guess works with the US DOT plastic 1986+ 240 setup.

Another 9004 offering from the same vendor:

https://www.superbrightleds.com/moreinfo/led-headlight-bulbs-conversion-kits/led-headlight-kit-9004-led-headlight-bulbs-conversion-kit-with-flexible-tinned-copper-braid/2212/

With a ballast and a flexible heat sink at the rear of the bulb assembly.

The LED bulb output varies by lumens (brightness) and even color temperature. I'm unsure what is best.

ORACLE Automotive Lighting Products

http://www.oraclelights.com/automotive-lighting-products/ORACLE-LED-Headlight-Fog--DRL-Bulbs/LED-Headlight-Bulbs/ORACLE-9004-LED-Headlight-Replacement-Bulbs

Autozone, eBay, and other 9004 bulb opportunities abound with an internet search for 9004 LED bulbs.

Amazon videos abound. Though perhaps not specific to your various 240 applications beyond 1986-1993.

I've yet to futz with LED lighting on 240, yet it is good to know you can plug and play replacement bulbs for the somewhat bothersome 240 tail lights.

Hopefully someone who has installed a 9004 LED head light bulb kit for North America factory plastic big square Volvo 240 headlights can offer up some more specific information for you.

Hope that helps.

Walnut Boy.