I was looking into this as well, I think the Rancho is only for use in 3.8L
Protek Oil Pan system I think was only for sale individually for the 3.8L as well - last I saw. But I could be very wrong. I ultimately decided on the EVO Protek for my jeep (crossmember, Oil Pan and connecting skid)
This is probably the most economic and effective kit I can find and know everyone who runs it is delighted with the performance of this lightweight, heavy duty system.
EDIT
From the Rancho Website
Oil Pan Protection
2012 - 2013: RS6236
2007 - 2011: RS6208
NEW mounting tab to keep armor in place
Protects the oil pan from direct contact
1/8-in. steel construction
Easy installation, installs over OEM oil pan
Shields the entire oil pan and maintains drain-hole access
Durable red powder-coated finish
Can only be used on 3.8L JK motor
From the ORE website on the only standalone oil pan listed
EVO MFG 2007-2011 JK ProTek Oil Pan Skid $189.99 ¼” Steel Skid Fully boxed for protection on all sides 100% Bolt on with Factory Hardware Accessible oil drain without removing skid Fits both manual and automatic transmission Powdercoated black This can be used independently or with entire system. Plus Shipping Cost (Weight is 13LBS)