Hi I'm in the process of looking at a retrim of my front Westy seats as I'm unable to find gen top bunk material. So I've contacted two of the more obvious companies for swatches. Laid against my sagging seat, here is how they fair: CONSTRUCTION NLA: The fabric is very soft so nice to the touch. It also has a white foam backing material which adds to the luxury. The stitching appears to be slightly wider and in some instances the wrong orientation than the OG material. VWH: The material feels firmer and not as soft. The stitching looks spot on to the original. It is not backed. Verdict: In my opinion VWH have the edge here. The material feel is almost identical to the OG material. If you want a softer more plush seat go for NLA. If you crave accuracy then VWH. COLOUR NLA: The colour seems lighter than OG but not by much. VWH: The colour reproduction is much closer. Nice and deep tones. Verdict: VWH has the edge again. Fortunately I have my untouched and unslept on top bunk material too and I have to say the colour reproduction is right there. PATTERN NLA: I would say it's 97% accurate. The most glaring departure is the jaffa thread count which is 7 lines on the NLA fabric but 6 on the OG. VWH: Again I would say they have it spot on. I couldn't find any departure points at all. Verdict: 3 for 3 for VWH. COST: NLA: At the time of writing green over jaffa plaid (C9223) is listed on the website for £39.95 per metre with 1.4 in width. VWH: At the time of writing green over jaffa plaid (231000022) is listed on the website on offer for £29.36 per metre with 1.4 in width (normally £41.95). Verdict: At this precise point in time VWH has it on price, too but when off discount it's a bit more expensive. In summary, if you want a more plush finish then NLA fabric is for you. If you want an accurate reproduction then VWH is what you need. Of course any issues with number of stitching lines, for example, could simply be batch issue for NLA so if you're in the market for new material do what I did and get a swatch. Afterall, things could easily change for the worse with VWH supply, too.