The diagram isn't actually that important but I know I need to earn your advice.
Basically we live on a private estate with very limited parking. There are two spaces for each home and half a dozen for the office on the estate. The office owns the car park freehold and maintain it. The Mill has some extra visitors spaces but The Meadows can only use the office spaces at weekends and evenings.
Recently the whole car park was resurfaced at eye watering expense. Everyone paid an equal share, although quite a few people feel that they had to hand over their money whether they wanted to spend a fortune or not.
There are two entrances to the drive. The Meadows houses have a regular gate on theirs and The Mill have a fancy electric gate, which they pay to have maintained.
Most people on the estate are completely normal but it seems that there is a parking monitor somewhere in The Mill. They are convinced people are using the wrong parking spaces, the wrong entrances and blah blah blah blah blah.
This manifests itself as perpetual passive aggressive complaints being sent through the freehold owner in the office. We ignore.
However some mad fool has got it into their head that the only way to fix our problems is for each space to have a sign. The signs must all be the same and the one suggested is going to cost £45 each.
There's no way on earth I'm paying that much for a bloody car parking spot sign. But if I'm going to object the least I can do is offer an alternative.
My first thought was to get a metal Kestrel for each spot, but for some reason they seem to be all sold out right now. I can't suggest a penguin bollard because it needs to be classy 
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So oh wise women of Mumsnet, what would you suggest?