The problem with the pioneer tools is that the racks were designed for US spec dimensions and a lot of tools now are made in China, and are not the correct measurements. You can put whatever tools you want in the rack since nothing is brand specific, but...
The US mandate for military equipment is that it be manufactured in the US.
So Here is what I found to make my truck as correct as I could make it.
Now if you are Cheap, then don't read further, because these tools are expensive. However, I believe you get what you pay for.
The axe company is Council Tool. Current USGI Manufacturer. I'm sure there are others.
I got a beat up take off from a HMMWV rack; It had a cracked handle so I bought a new one.
It is a single bit 4 lb curved handle dayton type. They can be bought direct from the Company. US Made.
Council Tool, American-made Premier Striking Tools and Drop Forgings - Product Detail
The Pick Mattocks, I have were made by Woodings Verona Tool, in PA, and were bought up by Ames. Along with many other companies.
I have two that were never used. One came on my truck, and one I bought at Aberdeen. Very well made, and all stamped with US.
5 lbs. #6 eye width.
You can buy the handles from Council Tool as well. Since there is no one source, you could probably buy the Pick mattock from Council as well. US made.
Council Tool, American-made Premier Striking Tools and Drop Forgings - Product Detail
Council Tool, American-made Premier Striking Tools and Drop Forgings - Product Detail
Ames True Temper shovels, are no longer made to the US dimensions and I couldn't find a source to buy an Ames True Temper shovel.
Instead I bought a Union Tools shovel which was made in the US, and was the correct fit, along with the plastic D handle. The ames true temper does have a Black plastic D handle.
Colemans does sell these.
Shovel, NEW, US Military Pioneer type [320501] - $29.95 :: Colemans Military Surplus LLC - Your one-stop surplus store with Army/Navy products for hunting gear, camping gear, emergency products, and survival products
UNION 43106 Dhrp open back shovel - Toolup.com
Here is where I bought mine. I don't think they have the US made ones in stock anymore.
The following is a shot of the pick mattock.