This chassis has been withdrawn temporarily due to a small problem with the etch, I believe. You may have to be a little more patient than you think!
Worsley Works etches are very basic and leave the builder to work out a lot for themselves. The chassis kits sold through the 2mm shop have nearly everything thought out for you by someone who is very familiar with 2mm components. Even for an experienced modeller, the 2mm designs are likely to be by far the best option where there is a choice available.