Keep an eye on official distributors like Plugin Boutique or the XILS-lab website. They frequently offer "Free with any purchase" deals or seasonal giveaways where you can snag premium plugins at no cost. Additionally, XILS-lab offers a Trial/Demo version which allows you to test the full power of the Iron Axe engine before committing. Top Free Alternatives to Iron Axe
If the VST has a "strum" mode, use it to avoid the "piano" sound. iron axe vst free download link
One of the best free acoustic guitar plugins available. Keep an eye on official distributors like Plugin