Hi @Lisa Pemberton the issue of tire touching on the bumper will solve by cutting the lower part of bumper as per marked by @Srikumar and @Frederic, but its better to be done in any garage because at the back side there are some bolts which need to be removed to do this job, cutting will be very simply done with knife but after that at the back side of the bumper there is plastic flap which need to be securely fit it to the bumper.
The skid plate i have done at Al Jazeera, Sharjah, 8MM plate with powder coating and fixing total cost 1090 Dhs. It will be less if you don't want powder coating.
pcs for reference.