Keep looking for what you want, these cars usually come up for sale when the winter weather breaks so you have to be patient to find what you want. You should go to Bowling Green, lots of cars there for sale in May.
I know you do not want a high mileage car, but there are really nice ones out there. Example my
GN has 108k on it and it had beat original 10,000 mile cars at shows.
You have to stick to your guns and take the time to find what you want. Or widen your search, most of the white cars came with blue interiors and if you are looking for an 87 limitied with black out trim they are few and far between (only seen 2 in the 6 years I have been heavy into TR's). You would proably have better luck finding the astro roof GN you were looking for.
I could have sold you my (rare) restored
T-Type a couple months ago. Sold in late November, was a super clean car all new.
Good luck with your search, don't get discoraged you will find the car you want if you wait
