Wanted: Cheesehead screws BSF

[Patrick Johnson]

Hi,
For my Sherman tank WS19 installation I need 4 more Cheesehead screws to hold the four shock mounts to the steel shelf below the carrier. Eight in total are required, two per mount. Would anyone have original steel Cheesehead screws (non-plated preferred) matching the following:

BSF 1/4-26 x 5/8

5/8" length would be ideal but 1/2" or 1" would also work. I am aware of British Fasteners in the States who can supply these, but would prefer original period ones if at all possible to match the four I currently have. The lockwashers and nuts are not essential, but that would be sweet if those can be supplied too. Willing to purchase them from you plus pay all postage.
Thanks in advance for your help,
Patrick