Try to find new old stock for uni solar pvl flexible panels. Search unisolar pvl 144.
The company went into liquidation some years ago but held a large stock at the time. Most of the liquidated stock has now disappeared but occasionally some new old stock surfaces, fortunately some are currently available on ebay. Personally,I would grab some of these immediately if I had a requirement for them.
These are an order of magnitude better quality than the normal flexible solar panels. I believe it was because they were of a high quality that the company went into liquidation as they could not compete on price with the tumbling prices of normal framed solar panels.
Most of the stock is on the USA and so postage will be very high but thus is offset somewhat by the low price of the panels.
Thoroughly recommend these panels.