Just take a look at youtube on how to strip them down fully and get them back together.
Takes 10 min to get the glock fully disassembled and assembled back, you will spend an good 40 min to do the same with a SIG (may take a way longer if you will have to get under the table to find the SIG self propelling small springs and parts, o yeah, and you have to get a new roll pin from sigarms each time you decide to take your firing pin out for cleaning, or so do SIGARMS recommends)
Glock parts are super easy to find in Canada and US, they are on ebay and bunch of online stores will ship them here and they costs cents
Try to find something for Sig.. GOOD LUCK.
If someone tells that Sig has good trigger...don't believe it, but try it yourself.
Yes, Sig does feet hand better, but if here is a war tomorrow I will take my Glock with me.
Glock finish way wear and scratch resistant then SIG. Sig is more accurate then Glock and you can shoot lead in SIG with no problem but in Glock you will have to scab barrel out to get the lead out.
If I have to make a choice I would go with a Glock. Glock is a tool, Sig is something to impress the friends with and have fun with it on the range.