Question about 5/16” adapter for 3/8” manual impact driver

[Shelbylex]

Please educate me
I got a 3/8” drive HK Porter manual impak driver. It has 2 philips, 3 sockets (7/16, 1/2 and 9/16) drivers. Given relative rarity I cannot find any flat tip screwdriver impact attachments.
I am guessing there had to be a 5/16” adapter as I found VIM and Tekton bits for sale. However, I can not find adapters for sale.
Would a 5/16” impact socket work as an adapter?
If not, which adapters do you recommend and where to buy them?

Thanks!

P.S. I started a thread on the driver before. Can not attach pictures now as my laptop is having some major issues...

 

[The Cobbler]

here's one https://www.ebay.com/itm/Wiha-72005...349494&hash=item4d3c41103a:g:N5kAAOSwCHBbCJUc
another https://www.ebay.com/itm/3-8-HAND-H...891015?hash=item4b638f6c87:g:DCoAAOSwmU1cx3Wa

 

[Shelbylex]

Thank you, The Cobbler!

 

[CBassB]

I just bought a Proto one (J6930) recently on Amazon for about $6.00

S


Sent from my iPhone using The Garage Journal mobile app

 

[Shelbylex]

Thank you, S !