Foresters, Columbian and CSA will offer FE policies. If he's a non-smoker and good health, Foresters should be lower premium.
If he's a smoker, Columbian should fare out better since there FE does not ask if they are smokers or not.
Columbian $140.84 EFT
Foresters N/S $118.65
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Foresters Smoker jumps up to $169.40.
PM me if you need a any further info or a contract.
If your dad is in good health and is willing to go through a paramed and blood work, of course his rates may be be considerably lower.
I would suggest permanent and stay away from term at his age.
If he is average ht and wt, takes a med for HPB thats under control and Cholesteral that is also under control, I would try the standand whole life before applying for an FE policy.
If he has a couple of other medical conditions that may not be too severe, than you might want to consider the FE product which he should get a level benefit of insurance. Again, Good luck!
If it's all about the death benefit, there's a few directions you could take this. As CaptiveBroker has pointed out, there are simplified underwriting choices with Foresters and Columbian. You aren't going to save a ton of money going the fully underwritten route, as preferred is off the table for everyone by NML.
To give you an example, on the fully underwritten WL side:
Guardian: $146/mo for 425k db (Guardian doesn't go below $25k)
Met Life $131/mo for $20k db
Am Gen is $131/mo for $20k on a non-par (no dividends) WL policy
On the GUL front you need to be at least $50k, and the winner there is ING at $142/mo. That's guaranteed for the rest of his life as long as the premium is paid. This is where full underwriting might be worth it.
Term looks pretty bad. 50k is the minimum on a 20 year policy and comes in at $156/mo, that's from Genworth
Just for kicks I looked at $100k because that'll put more players on the table, U.S. Life was the winner there at $255/mo.
If you want to go down to a ten year term Genworth wins there at $122/mo, again that's only a 10 year term policy.
The term policies where fully underwritten, but I assumed standard on all of those as well.