NEW YORK — Even a blown plane engine is a fundraising opportunity for the former president. Ex-President Donald Trump is asking his loyal army of supporters to help him buy a new plane after a private plane was forced to make an emergency landing last weekend after one of its four engines malfunctioned. “My team is building a BRAND NEW Trump Force One,” screamed a mass email sent by Trump’s Save America PAC. “I can’t wait to unveil it for everyone to see.” “The construction of this plane has been under wraps,” Trump teased. “Not even the fake news media knows about it — and I can’t wait to unv…