A few days ago I was talking with Katharine Berry and a person whose name I forgot about Megaprims and the SALT HUD when I mentioned that a web based solution to "order" megaprims would be nice since it could offer a graphical preview. Katharine liked the idea and started to code and in only two days finished megaprim.sl - a full featured graphical web based megaprim search engine.
On the first screen you enter the desired dimensions for the megaprim with the option to search for prims with exact matching dimensions, or megas that are smaller or larger. You can also account for a certain flexibility in the results. The permutation setting allows you to search for prims that match the query by means of rotating it - this is useful in some cases but needs to be switched off in cases where you want to convert the prim type to e.g. cylinder or where the center of the prim would be outside your parcel.
After submitting your query the website displays a list of matching prims. Via "get it" you can have the prim delivered to you. In order to prevent spamming/abuse, the in-world server sends you a confirmation link first - once per session (i.e. as long as you don't close your browser session).
Megaprim.sl is a fast and efficient way to get megaprims delivered, and has many advantages over the SALT HUD. For feedback and suggestions please comment on Katharines blogpost.