We bought from Ebay.
We bought this kit from Ebay Item number 142458182320 We bought it last April and it works great.. Well when we have the sun that is lol.. We were parked up next to a friend who has a 250w rigid panel and same controller, it was sunny but low as it was about 3 weeks ago. but we compared input amps and we were pulling in exactly half of what he was getting. So not bad really. Mine 140 semi flex and his 250 rigid.
I was quite happy with that. Through the summer when the sun was higher we had no problems with power, this time of year is a bit different, I'm going to invest in another 140 panel to join this one sometime.
Also about 4 years ago I bought a Baired 100w panel semi flex and it's still working great on my old van. it keeps the battery up and the battery was bought in 2011. This van is only used once or twice a week and is never plugged into the mains for charge. Granted it doesn't have much to run. Mainly the heater Eberspacher D2 and the lighting which isn't led.
So all in all I quite like the semi flex panels.