There are plans/drawings currently on the table showing new car parking facility designs not for Campbeltown but for national consideration.
The one which looks to be the most promising design, which also keeps vehicles off the streets thus allowing a more safer pedestrian enviroment is, The underground conveyor kit, (TUCK) for short.
What this system would do is quite a clever and well thought design, the basics of it is, you park your car on top of a grid which looks just like a parking space, you then key in a estimated time of return (ETOR), and watch your car go down underground, all done by computer and conveyor belts.
On early return for your vehicle, you would go to the 2nd grid, type in your code for your car, and hey presto your car would pop back up from the ground.
The teething problem with this system is the time each car takes to come back up, its a similar problem with the belts at airports for luggage, the can be slow.
The link below should help you with any question you may have on this system.
http://www.conveyorbelts.com/