Filtersystem Adapter 18,8 klein suggestion

Hi, I hope this is the right forum for this, but I have an interest in getting this piece by Magic Glass, but I wrather have instead of the open-ended male joint , a female glass ground joint. I still want the diffuser-male joint combo on the other side. Is it possible to get this piece in this way? I notice that the description says that some of these pieces might have to be made after the order, so maybe it's possible?

Here's the link:

http://shop.grasscity.com/shop/grasscity/mgg4213049.html

Thanks!

Here's my cheesy photochoped representation...