Car stairs/ladder recommendations for large dog

[Lincsls1]

Hi.
Looking for recommendations for a set of car ladder/steps to help my ageing dog climb into the back of the Astra Estate.
Loads on eBay to look at, but don't want to pay out for rubbish as it were. Loads of photoshopped examples on there.
The dog is around 40kgs.
Any suggestions, thanks...

[Grumps.]

Loads on Amazon and the beauty of buying from there is it’s easy to return stuff, especially if your dog refuses to use it, as ours did.

[lost in espace]

I bought one of the cheap plastic fold out ones, and glued some carpet to it as it was very slippy. Dogs like it but you can catch your fingers folding it up.