Hello and welcome! Glad to have you here.
No need for a new vehicle, we'll find something that works for you!
A lap belt is safe for a rear-facing only car seat install (it should
not be used for a booster seat
or a person sitting in just the belt. Your vehicle does not have a centre top tether hook, and Jeep doesn't have a top tether anchor retrofit available, so that position cannot be used for a forward facing car seat either).
A few questions to help us give you better suggestions:
(1) What is your budget for a car seat?
(2) Do you want an infant seat with a base (the infant seat is removable to carry baby around, base stays in vehicle) or a convertible (would stay in vehicle, lasts longer than infant seat)?
(3) What is your goal for rear-facing? The longer, the better. Rear facing is 5x safer than forward facing for children under 2 years old, and would allow your centre seating position to be used longer.
Here is a short article on why rear facing is so heavily recommended by the American Academy of Paediatrics, CPS Advocates and Technicians, and countless others:
http://carseatblog.com/5168/why-rear-facing-is-better-your-rf-link-guide/
There are plenty that will work for your vehicle. LATCH is nice to have, but it is not necessary at all. A seat belt install is just as safe!