What is the strongest cyanoacrylate glue I can reasonably purchase?

I will be competing in a structural engineering competition near July, and I need to find the absolute strongest CA I can find. So strong, it should be illegal :P. Basically, I will be building a triangular shaped truss (Kind of like a bridge), and I found out that the reason why my truss failed was because of a joint coming undone, causing a chain reaction that destroyed a portion of my truss and caused it to have a structural failure. It won by a large margin, however, and it was extremely weight efficient aswell.

http://shop.pitsco.com/store/detail.aspx?KeyWords=...

When I was at the regional level, I used this, and I learned the hard way that that stuff was hardcore weak. I only won 2nd place that time.

The strongest my school has is this stuff: http://shop.pitsco.com/store/detail.aspx?KeyWords=...

I used that glue at the state level competition, and I won 1st place by a large margin.

So far, I am looking at this: http://shop.pitsco.com/store/detail.aspx?KeyWords=...

The parameters for the cyanoacrylate are:

1) Must be reasonably priced. I wouldn't want to purchase a half ounce of CA for $150. I am looking at $10/oz as the ceiling

2) Must come in a 0.25oz, 0.50oz capacity. I can look at 1oz but I'd like to have a bottle of weaker CA and a bottle of megastrong CA, and the competition limits your CA to a total 1oz marked on the bottle[s].

3) Must be purchasable online with little to no hoops or hurdles. If I need to sign some crazy chemical contract or something, or if it is some banned substance in the United States, then no, I would not like to use it.

**The only answers I will consider are those which cite actual sources. Suitable sources are tests, reviews, or videos. I will NOT accept "Personal Experience", or people just winging it. I will report any answers which obviously have no thought, such as 'buy sum krazy glu **** works gud'**