So I headed over to MEC and picked up three items: one Red Zepplin CO2 Inflator with 2-16 oz. cartridges: so I have a pump back up. (hopefully now I'll avoid another escapade like last weekends)
A tube of WildBerry Nuun electrolyte drink tablets. It uses a sort of carbonation tablet, so I was surprised when I took my first sip and it shot out like it was under a bit of CO2 pressure.
And I picked up 2 yellow XS Raincovers made of waterproof coated nylon to mangle into shape for seat covers. For only $6 cdn each; they come with a drawstring to snug it down in either black or yellow and a small stuff sack to store it in.
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When I got home I wanted to see if they would fit out of curiosity. Well sure enough they fit really good over and under the seat well enough that I will not have to get Alice to chop them up at all. 
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So If you want a cheap seat cover for you recumbent look into xtra small pack rain covers at your Local MEC, REI or camping supply store!