I found a listing of online sources that sell that spring compressor:
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NationalToolWarehouse.comOTC Tools & Equipment 7045B Front Coil Spring Compressor by National Tool Warehouse
Free shippingˇNo tax
$163.00
$163.00
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Summit RacingOTC Tools 7045B: OTC Front Coil Spring Compressors
Free shipping
$190.99
$206.46
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TRUCKiD.comOTC 7045B Coil Spring Compressor$183.08
$216.86
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JBTools.comOTC 7045B Compressor, Front Coil Spring
Free shippingˇNo tax
$196.15
$196.15
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eBayOtc Tools 7045b Front Coil Spring Compressor
Free shipping
$192.49
$204.04
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ToolTopia.comOTC Tools (OTC7045B) Front Coil Spring Compressor # 7045B
Free shipping
$169.51
$179.68
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Tool DiscounterOTC 7045B Front Coil Spring
No tax
$191.50
$202.46
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Auto Body ToolmartOTC Front Coil Spring Compressor - 7045B$237.66
$280.15
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Unique Truck Equipment Front Coil Spring Compressor
No tax
$202.55
$212.50
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Here's the thread from a mustang site, the links didn't copy when I copied and pasted the post. You can read the post and click on the links:
https://www.vintage-mustang.com/thre...nerve.1178850/
I have an old OTC tool, probably close to 50 YO that is constructed like this tool that has done a bunch of coil springs, you might try it if you can't obtain the one you're looking for:
https://www.amazon.com/OEMTOOLS-2720...PK2131YEKKY89D
Only drawback is you have to grab the second row of coils so it doesn't end up inside of the spring pockets when you release it, and you sometimes have to pry a couple of the coils apart to remove the hooks after removing the screw from the cross pieces so they're easier to retrieve. All the double hook compressors are pretty much the same that I've used.
One piece of advice is never use an impact tool because it will make the threads roll on the screw causing it to fail, and keep them well lubricated with grease or oil.