For that size, there aren’t a lot of options.
A few companies make them that big, and they’ll be in the typical catalogues that appear in church mailboxes by the truckload every Fall. They all sell the same thing from the same suppliers. Very limited options.
Unfortunately, “call us for a price” is almost always said, and that makes it very hard to compare options. It can be like pulling teeth when I ask “can you please just tell me if it’s going to be close to one thousand or close to fifty thousand?” and they have the attitude that if you’re not ready to spend $50,000 without thinking about it, they’re wasting their time talking to you.
Demetz makes them.
demetz.com/content6ba6.html?L=3&IdMen=151
Just for some perspective, one traditional looking corpus from them in 60" size sells for about $9,000. To fit a 10 foot cross, you’d need much bigger.
They can supply either just the corpus or a complete crucifix.
I would actually recommend getting just the corpus.
Once you have that, you can then get the cross according to your own parish budget and needs. If you have someone skilled in basic woodwork, a very nice cross can be made from standard lumber and stain (use a hardwood of course, not just pine from a building supply store). At the other end of the expense scale, you can have the cross made by a company that does custom church woodwork. They can then add anything you like, from custom scrollwork on the wood to gold-leaf on the edges.
Here’s an example
newhollandwood.com/
another
kingrichards.com/category-products/71/Crucifixes—Wall-Mount—New/
Either of them can take a corpus from a statuary company and make it into a crucifix.
The benefit of a company like that is that they can make a crucifix that matches existing church decor. If you have a 200 year old church with surviving woodwork they can make something that looks like it’s been there all along.
By going that route, you’ll have a crucifix that is unique to your own parish, rather than one that looks like it came from a catalogue.