'Richard,  You should only be using the 6 bolt if running a Ranger. The 8 bolt sets up a vibration on the Ranger per Joe Denest.  The 6 bolt A Hub are getting hard to fine. Your 8 bolt is the heavy hub for the Stearman and Waco. I just sold one for $650.00 with fresh silver cad.  You will need to place a want ad to find.  John Duncan had some Warner hubs. Try him. Here is his email address. He owns the Warner Engine Company here in Colorado.  
johnaduncan@msn.com  JST
  Jamie S. Treat A&P/IA
Aircraft Restoration & Repair, LLC
Fairchild Club DVD Editor
IAC 5, Chapter President 
http://iac5.org
Kelly Airpark (CO15) 
http://www.kellyairpark.org
24201 David C. Johnson Loop
Elbert, CO 80106 Hm 303-648-0130
Cell 303-304-7937 Quote of the Month: Never fly anything that doesn't have the paint worn off the Rudder Pedals. - Harry Bill       
From: fairchildclub@] Fairchild 24 Parts    Hi Jamie  My Fairchild is coming along nicely, just been painted in its original RAF markings, looks lovely.  I ordered a new Sensenich Prop, W86R 60 which came a couple of months ago.  We came to fit it yesterday and its only got 6 bolt holes, my hub has 8!!  Do you know if the 6 bolt hubs are available anywhere?  It'll be cheaper than a new prop!  I was going to put it on the forum but can't get on.  Many thanks  Richard EllingworthTo: 
fairchildclub@yahoogroups.com
From: 
fairchildclub@yahoogroups.com
Date: Mon, 9 Mar 2015 17:17:33 -0600
Subject: RE: [fairchildclub] Fairchild 24 Parts
    Richard, Sent to your email listed below. JST Jamie S. Treat A&P/IA
Aircraft Restoration & Repair, LLC
Fairchild Club CD ROM Editor
IAC 5, Chapter President 
http://iac5.org
Kelly Airpark (CO15) 
http://www.kellyairpark.com
24201 David C. Johnson Loop
Elbert, CO 80106 Hm/Hgr 303-648-0130
Cell 303-304-7937 Quote of the Month: Never fly anything that doesn't have the paint worn off the Rudder Pedals. - Harry Bill    
From: fairchildclub@yahoogroups.com [
fairchildclub@yahoogroups.com] 
Sent: Monday, March 09, 2015 5:09 PM
To: fairchildclub@yahoogroups.com
Subject: [fairchildclub] Fairchild 24 Parts   I've recently purchased a Fairchild 24 here in the UK and looking for parts for a full restoration in the future months. Can any of you guys give me part suppliers please. Engine, airframe, interior. Any help kindly appreciated. Regards Richard, Lincolnshire, UK  '