Try Summit Racing they carry all the Auto Meter gauges... Carbon Fiber, Sport-Comp, Ultra-Lite, Pro-Comp, Phantom and Performance... You can search Auto Meters site and get the Numbers from the site and then go to:
http://www.summitracing.com
Then search and order by part number... Just put ATM- in front of the 4 digit AM number and get the pricing and Details... Say you want to see the Carbon Fiber 5" in-dash 10,000 RPM Tachometer you would enter ATM-4898 under part number...
You can find almost any aftermarket web site like painless and find the part number for the headlight Relay for you H4 light you enter PRF-30815 and you get:
PRF-30815 Headlight Upgrade, max power w/direct battery hookup thru a relay $71.95
Which is about 20 buck cheaper then some people have paid for the same thing...
Order a catalog and you can figure out the summit code for other Manf that they use....
BTW
Jegs 5" in-dash 160 MPH Speedo part number 105-4489 Ultra-Lite is $199.99
Summit 5" in-dash 160 MPH Speedo Part number ATM-4495 Ultra-Lite is $112.95
The one Jags shows is Elec and Summit has it also 4 cents cheaper. Jags does not show the Mechanical one that you could prob get by with...
IMO Jags catalog bites next to the Summit