Greenhouse clips for bubble wrap
I am after some greenhouse clips to attach bubble wrap to a greenhouse frame with an air gap - I have found the alliplug style ones but am looking for some which don't tear the bubble wrap. My partners Dad has some which similarly to the alliplug slot into the aluminium frame and then stick out to create the airgap, but then a 'cap' sits the other side of the insulation to clip the two together rather than piercing the wrap. Can't seem to find them anywhere, anyone seen them online or in shops?
Thanks in advance