Last week, StarWars.com published a report of Master Replicas presentation during Comic-Con 2005. Stephen Dymszo, Master Replicas Vice President of Product Design, showed up at Comic-Con in San Diego to share news about new Star Wars prop replicas in both the design and production stages.
Although it does not get mentioned in StarWars.com's article, we can clearly see the Headpiece to the Staff of Ra replica (from Raiders of the Lost Ark) in a speak peek picture for 2006. This lead to the rumor that Master Replicas is producing an Indiana Jones prop collection.

This was very exciting news, until I found out that Master Replicas does not hold an Indiana Jones license at this moment. Something they need if they want to sell Indy prop replicas.
Hoping to get more information, I contacted both Master Replicas and Lucasfilm. Master Replicas answered that they had no information on Indiana Jones. And Lucasfilm has let me know that they have no licensees in the area of Indiana Jones collectibles.

But don't give up hope! This could also mean that they are working on an Indiana Jones replica collection but that it's too soon to share info about it yet.