Did ANY toy company ever produce the VFH-10 AGAC HeliFighter または VF-8 Logan? Provide link, please.

The short is answer is not really, there may be some miniatures for the RPG but in terms of figures, transformable または not, there are none. In case あなた didn't know Robotech was a fusion of three shows SDF Macross, SDC Southern クロス & Genesis Climber Mospeada that had nothing to do with each other. The middle chapter, "The Masters Saga", was based on Southern Cross. Sadly that アニメ was cancelled after 23 episodes and wa rushed to conclusion. Because of this there are only a few model ktis of the main characters in their armor and the only mecha made was によって Matchbox, specifically the VHT-1 Spartas.

Even figures of the ASC crew were only made here. The blueprints to make these toys exist but HG has been sitting on them for years. Toynami says it's because the there isn't enough of a market for them, to an extent they're right since most of the Robotech fandom didn't like the Southern クロス portion of the 表示する and only kinda like Mospeada (Also since HG can't make that many Macross merchandise, Mospeada seems to be their go to.)

So yeah that's basically it. It's possible but not under the current leadership. If あなた have a 3D printer maybe あなた can use the blueprints... that's my answer.