The FLM's aren't extended enough to fit the rear dogbone I think. The FLM's are extended over 2in when while the FLM's are only extended 1.6in.
If you don't want just upgrades from the XL, I highly recommend a tank upgrade. You can get the New Era Models kit or you can go mid tank. The New Era kit consists of the OFNA 125 tank and a tank guard. When you do the mid tank, it's more costly, but moves your tank to where the radio box is. This removes mid tank lean (So does the New Era kit), moves your tank to a safer area, and looks cooler.
The FLM TVP's are great. They have both extended and non extended. They have LCG TVP's and TVP's made with the design of the Savage 21/25 TVPs. I highly recommend going Extended LCG TVPs. All of their TVPs are 4.7mm thick for heavy duty durability. They also have all the holes drilled needed for a mid tank, servo relocation, and many other features.
Innovative RC also makes some nice TVPs, but they are in the UK. Not sure if you wanna pay shipping.
PlatinumRCProducts make some nice Carbon Fiber TVP's and other Carbon Fiber items like servo plates and motor plates.
I recommend upgrading your servos. Get a nice torque servo for your steering and move the SF2 (I think) steering servo to the throttle. Also replace the spring on the brake linkage with fuel tubing for strong braking.