Not a problem, just wanted to toss my hat in to the ring as we do our best to always have the Fox LV's in stock.
On the Gen 3, you can definitely go with a spacer or springs. It will depend on the load you intend to carry in the rear as the OEM springs are soft. On our Gen 3, we did Geiser rears to support the chase rack in the bed.
Regarding the chase rack, our go-to brand is RPG as they seem to be the best bang for the buck and have the functionality that most folks are after (two tires, jack, storage box or fuel jugs) and they're a solid price point...minus the fact that they have to freight ship from CA to WV. For the vast majority of folks going with chase racks on a Gen 2 when you have leveled suspension up front, you'll want to go with the Deaver +4HD. This gives you a 2" lift over stock plus the additional 450lb load capacity. On average, a chase rack setup with the rack itself, two tires, and some gear is going to be around the 400-500lb mark making the added carrying capacity of the Deavers perfect. I also like to go with the +4HD because if you intend to use the truck off-road with the weight in the back, overtime you will flatten out the springs as leaf springs are a wear item, so the +4 will give you more life. And if you do find the +4 to be too tall, we can also perfectly dial in the height with drop shackles to bering the rear down either 0.5" or one inch, depending on your needs.