Hi Kiarna96H,
I had to give up my Humapen Luxura that could administer half units, and now use a Humapen Savvio that administers whole units, all because Lilly no longer made the half unit pens for Humalog 3ml cartridges.
For me that half unit was the difference between BS in range and either going high or going low.
I emailed Lilly, phoned local pharmacists, searched on ebay. All dead ends, so only options for me were to make do with the whole unit pens and adjust my carb intake, or get a junior pen.
I have been adjusting my carb intake, which is not ideal, but it kind of works for me.
My work is as an electrical engineer, and it's really difficult trying to manage T1 when i can end up having unplanned physical activity, or the complete opposite when work gets aborted, and I've allowed for a physical day!
No 2 days are the same and it's a constant juggling act.
Like you, I find an 8g carb snack will send my levels high, and I will have to plan a snack with such precision.
Good luck with your 1/4 unit pen search, and I hope you can find some sort of resolution with your career.