10 months in the cryo chamber now...😴
Do not jump to assume you should buy a fuel system on ebay or another dealer.
Do not attack the dealer—honestly, they have nothing to do with this and hold almost no authority in decision-making on this matter.
The reason it's taking so long is because FCA needs to re-engineer the entire system, and this is not the only system that needs to be re-engineered. The fuel systems they have sitting on-site are merely a temporary fix for warranty holders, and even those replacements need to get signed off by corpo (which can be hit-or-miss.) They messed up badly, they got caught with their pants down one-too-many times, they're getting sued left and right, they're losing lawsuits left and right, and now they're "playing it safe" at this point.
Installing a fuel system you acquired on ebay, or an aftermarket, will get you back on the road ASAP but it will not alleviate the risks of reoccurrence. The fuel system is fundamentally flawed. If your aftermarket is modeled after the original, then it's also flawed. So, base your decisions with that in mind.
Try to set this issue on the backburners and do something else with your life. Do not let this take over your life. When thinking about timeframes, start thinking in months instead of days or weeks.
Do make make attempts to seek reimbursement if this has affected your life, as well as a temporary vehicle. This can require anywhere from 2 to 5+ calls to FCA to make it happen, depending on who you get and how well you can control your tone 😉