i have seen Kedai "Abang" got them. 2 types available. The good ones has cloth inside while the outside is plastic sheet. Comes in various sizes for diff cars. If not mistaken, it about RM150.00. That was almost a year ago.
The cheaper plastic ones better not buy. The seams are bad and will koyak very fast due to thin material used.
Next weekend, myself and Mr.P will be making a few day trip up-north to do survey and find out more about the logistic before we finalise the details for our nothern convoy planned trip later end of the year.