Why don't you buy one and test it? They do not cost much.
I have not bothered to buy one because the tests I have seen show that they are a compromise. The scalar area is smaller so it does not do as well as a conventional lnb. They may be good for somebody that would sacrifice some signal in order to get more lnbs on a dish closer together.
I do not think WSI Digital ever had that lnb for sale. Hypermegasat tried to carry them and could not get any stock. You may contact Hypermegasat or get them directly from Europe for around 60- 70 dollars a piece shipped.