Have you raised the issue of the parking permits with the housing association?
Has anyone complained?
What solution are you looking for? To make the housing association allow you to park?
Unless parking of a motor vehicle is specifically allowed in this area, then they are allowed to stop you parking there. I don’t know the terms of your tenancy agreement but they could argue that it’s a breach of the agreement by doing so and give you notice to quit and you would then be faced with arguing in court over the permit.
Why don’t you write to the housing association and tell them that you are happy to parking the car park and display a permit and can they send you please permit suitable to attach to a motorcycle.
I know you’ve already done that, but make sure that you have it in writing.
You may have seen the tax disc holders which have a circular tube where the tax disc is rolled up.
You could put the permit in that and you are still displaying it and if the parking company decide to issue a penalty notice, you would then have to deal with the penalty notice.
Can I clarify anything for you because I’m not certain what kind of answer/solution you are looking for?