Joe, those parts are all in stock at DigiKey , but there's a $25 minimum order or $5 handling charge.

They're even cheaper at Mouser ($3.42!), but the reed relay is out of stock until late August. Substituting an identical Magnecraft W117SIP-1 (in stock, $2.14) brings the total to $4.55, no minimum order.

I emailed an image of the diagram to Scott yesterday and asked him to post it here.