I don't know of a direct way to send him money, but here is an alternative method from another thread

Another way to donate:
From Jim Schelberg of the PinGame Journal --
I just got this from designer Barry Oursler (Jan 26, 2014) and I'm hoping anyone who reads it will help.
"In February 2013, I was diagnosed with bone marrow cancer. The treatments and prescriptions are not fully covered and last July, Donna was diagnosed with kidney failure. She must receive dialysis three times per week and her prescriptions are also very expensive. To make matters worse, it is costing us $350 per month for her transportation no matter how we have tried to lower that cost.
We have been married almost 40 years and I would like to keep us both around for awhile longer, but things have gotten pretty desparate at the Oursler household.
I have never done anything like this before but I didn't know where else to turn except to my friends and fans in pinball.
If you can help, any amount would be appreciated. Thanks, Barry"
(Please donate at the link below. If you would like to use a check, I am accepting them on Barry's behalf. Make them out to the PinGame Journal, mark it For Barry and send to 31937 Olde Franklin Drive, Farmington Hills, MI, 48334 USA.
Also, all donations to the PGJ through PayPal at the PGJ web site for the rest if this month (Jan 2014) will go, instead, to Barry. So if its easier for you that way, do it. -- http://www.pingamejournal.com/cool (you can increase the "Quantity" to increase your donation)

To use "Go Fund Me" go to:
http://www.gofundme.com/6fgkt0