Side feed DW950 are a freak occurrence. Basically when DW has a large production run of injectors a very small percentage of the ones that should flow 850 end up freakishly flowing more. Those injectors are flow matched and grouped together for sale as "950's". For every couple hundred 850 injectors they might come up with one or two sets of 950's. So long story short they aren't exactly readily available. You just need to call DW and see if they have any available. I run a set in my car and they are fantastic.