Summit does not list much on there website or catalog. Your best bet is to get the Part numbers from the Auto Meter web site, then call summit and give them those numbers. They stock alot of the items anyhow.
The SPA gauges are entirely digital. Personally, i cant stand them, others love them. I have too many problems with digital displays failing and also it is annoying as hell reading a gauge that is always jumping around and is not steady like a needle in an analog gauge. With an analog gauge you can glance out of the corner of your eye and see the needle and since you see it everyday, you will know what it is reading. With Digital gauges all you can see in your peripheral vision is the warning light. The LCD displays are sized small so they can fit two of them in 1 gauge, thats nice if you need to monitor alot and have limited space but makes the gauge hard to see. I have an automatic trans so all i monitor is Trans Temp, Boost and EGT. The only other gauge i will ever get is a fuel pressure gauge. So i have no need for dual displays in 3 gauges that are so small i cant read and are bouncing around like a Nintendo game. And i have no need for warning lights since i can read my analog gauges so well. Also, the back lighting in the SPA's is not very good. Its personal choice. This has been covered MANY times if you look back in other posts. Everybody is entitled to there own opinion. Some people love the Spa's, others dont. Get what is right for you.
If you are going to go analog or mechanical style, Autometer, VDO or Westach are good.
If you want SPA's i have 3 of them (used, but in mint condition with senders) that a friend removed from his truck
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01' Intense Blue 4x4 QC SB Auto, Black Leather, Camper/Tow package, etc, etc. JRE Exhaust, Psychotty, Autometer Sport Comp: Trans Temp, 0-35psi Boost and Pre Turbo EGT Gauges, Rhinoliner, PIAA 520 Fogs, Stull "Diamond wire" grill, Westin Stainless sidebars, Smitty bilt "Outland Sport" stainless bumper guard, Hella B/U Lights, Tint, Pioneer audio, JL Audio 12" Sub in center seat. SEAL TITE crossover box. Amsoil dual bypass with the "CPFF" Adaptor and braided stainless lines, Husky liner mudflaps, Motorola Spectra Locomotive radio, Mag-Hytecs Soon.