Looking for a calculator/ website to tell me the approximate closing price of proprietary mutual funds ahead of the close

I realize no one has a crystal ball but hold a lot of proprietary mutual funds from EQ, JPM, 1290 etc in my 401K. Any buy/sell decisions have to be made by 3PM. I would like to have a general idea (I don’t need to know to the penny) what I will get if I give the sell order that day. I realize there is still the possibility of a market event at 3:01 but something is better than nothing. For most of the funds I hold, I can only see the top holdings but that is only about 50% of the value and it does not always correlate. Yesterday I expected some of these funds to be down when I finally logged in to see the update and they were not, even though several of the largest holdings were down for the day.

IS THERE A WEBSITE THAT CAN HELP WITH THIS AND TELL ME RIGHT NOW APPROXIMATELY WHAT THESE FUNDS WILL BE WORTH LATER TONIGHT WHEN THEY SETTLE FOR THE DAY?

I am moving a lot of money out of my 401K and into an IRA (yes I know all the pluses and minuses). I am NOT trying to time the market, but a lot of these investments are less than 6 months old. I had intended to keep them there a while but circumstances have changed and I need to move them. However, while sooner is better, moving them tomorrow or a month from now does not matter to me.

I am trying very hard not to lose money I put in recently. However, there are a few funds that are close to break even. A couple underwater and a couple have done ok. I have a thing about not losing money on my 401K, otherwise what was the point of putting in $2K in November and then losing it when I sell in February?

I find it very frustrating that mutual funds are the only item that you do not know the final price when you buy or sell